Drive-belt.



A. G. KOLBEY DRIVE BELT.

APPLICATION FILED JAN. 9, 1909,

941,786. Patented Nev. sa 1x59.

'.UGUST G, KGLBIE, 0F DETROT, HECHIGN,

T6 DETROIT OAK BELTING pervenute.

Specification o Lettera atcut. Pgmgmtd Nv, 3Q), im,

application illerll January 9, will?. 25e. 1171,45?.

citizen of the United States America, ref' at Detroit, in the county of Wayne and .State or Michigan, have invented; certain new-and useful improvements-iu illu-ivelelts, of which the following a speciticatiomreterence being had `therein to the accompanying drawings.

The invention relates generally to leather drive belts, and more particularly toa construction of belt designed for use in connection with grooved pulleys.

The invention consists in the construction of the belt, in the-peculiar arrangement and combination of itsI parts, and in certain `details of constrnctiouas will beine-re fully hereinafter set tortlr ln the drawings, Figure l is a perspective view it a length of belting made in accordance 7vith my invention; Fig. 2 an enlarged cross section thereof; Fig. 3 is a similar section taken in the plane of the fastening means; and 4 and 5 are perspective viewsillustrating modifications 1n the belt formatioi'ig i To permit the belt to properly engage the grooved pulley, it is made in substantially Wedge-shaped cross section as shown, the side-edges A ll constituting the Jfriction drive surfaces and the top and bottoni portions C l) respectively the belt faces-us they will be hereinafter termed.

l`o provide the requisite amount of friction surface the belt is niade of considerable thickness, and to produce this a number of plies` ot leather are'employed-two in this instance being' showin-l"` representing the outer ply and (l the inner ply. These plies are cemented together, and are preferably 'further :secured to each other by metallic screws D which eutend preferably from the outer the inner aces ot' the lbelt.

ll'hile the multiple construction allords the desired ai'nount of friction drive surface for the belt, the alniornml thickness tends to malte the belt i, and thereby materially reduces its eribility' To ob'viate this dcfec' und at the eanietime retain the full amo-unt ot friction surface, one of the belt faces is formed with a series et transverse scores or grooves lfl. which cut through the snnooth surface of the heit sltin hut do not extend sutt'ieient-ly into the hide to materiallj.Y decrease its tensile strength. This scoring does not appreciably reduce the :trictlon driving surface upon the belt edges, but increases tine )flexibility to more than overcomethe disadvantages of the excess thielrJ neus. rllhe screws D eectively retain the `)lies together, and are so disposed in the elting as to be errangedone for each section intermediate the scores, as illustrated in 'The vtwo or more `plies of leather that form the belt/ing areplaced with the flesh side of the leather in contact.'

ln Fig. .l l have shown the scoring formed in the outer face of the leather, but it will be understood that the inner may be scored only, or both faces may be scored if desired Where the thickness of tht belt makes it necessary.

In Fig. the belting is shown with la. scoring upon the under face, and the scores extend obliquely from one edge to the other. This desirable, as it materially reduces the tendcecy of the belt to break by reason of the scoring.

In Fig. 5 the belting is shownas scored both upon the outer and inner faces, the scoring being oblique to the faces and the series of scores or grooves upon -one face bel ingr arranged at an angle to those upon the opposite face, this feature of construction being a further safeguard against possible breaking or cracking.

What l claim as my invention isf l. drive belt having a transversely scored cuter face.

f 2 A drive belt having a transversely scored outer face and friction drive surfaces upon its opposite sides or edges; l

3. A. drive belt termed of a plurality of plies of leather secured to cach other, the outer plyV being transversely scored on its outer tace. A

4. A drive belt comprising a plurality ot plies of'leather cemented to each other, the opposite edges of said plies forming friction drive surfaces and the outer face 0f an external ply being transversely scored, and metallic auxiliary securing means for the pliesinterniediate the scores.

.A drive belt composed ot' a plurality of plies of leather secured to each other with the liesh sides of the leather in contact, 'the outer face of an external ply being trans versely scored.

A drive belt having friction drive surfaces upon opposite edgeshtlireerend the outer face of en externe-lply scored transversely et plurality of points distributed Opposite edges of said plies 'termin the frietiondrive surfaces andthe outer ace of en external ply being scored transversely.

8. A drive belt having its outer and inner Vfeces scored transversely, the scores or grooves extending obliquely y from side to side, and the scores upon one i'ace extending lu an angle to the scores upon the opposite ece. A

S). A drive belt comprising n plurality of plies ef leather secured to eeen other,' the opposite edges 0f seid plies forming friction drive surfaces, and one of the belt faces being transversely scored, the depth of the scores being less of the plies.

l0. A drive belt comprising a plurality of 'plies of leather secured to each. other,-tlie opposite edges ofseid plies forming friction drive surfaces, and one or' seid plies being scored transversely for its entire Width.

In testimony whereof I affix my signature in presence of two witnesses. l

` AUGUST G. KOLBE. Witnesses: f

. JAMES P. BARRY,y W. J. BELKNAP.

than the thickness of ne 

